#include "FastLED.h"
#include <LiquidCrystal.h>
#define PB_PIN 2
#define LB_PIN 3
#define SW_PIN 4
#define FR_PIN A0
#define LED_PIN 6
#define NUM_LEDS 16*16
byte baza = 1;
byte bright = 2000;
bool sbros=false;
volatile int mode=1;
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
CRGB leds[NUM_LEDS];

void setup() {
  lcd.begin(16, 2);
  FastLED.addLeds <WS2812, LED_PIN, GRB>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(bright);
  pinMode(PB_PIN, INPUT_PULLUP);
  pinMode(LB_PIN, INPUT_PULLUP);
  pinMode(SW_PIN, INPUT_PULLUP);
  attachInterrupt(0,pravo,FALLING);
  attachInterrupt(1,levo,FALLING);
}

void loop() {
 int svet = analogRead(FR_PIN);
 if(svet<511 && !digitalRead(SW_PIN)){
 sbros=true;
 black();
 }
 if(svet>511 && !digitalRead(SW_PIN)){
 switch(mode){
  case 1:
  lcd.setCursor(0,0);
  lcd.print("    1: STARS    ");
  lcd.setCursor(0,1);
  lcd.print("< 3          2 >");
  stars();
  break;
  case 2:
  lcd.setCursor(0,0);
  lcd.print("   2: FIRERUN   ");
  lcd.setCursor(0,1);
  lcd.print("< 1          3 >");
  firerun();
  break;
  case 3:
  lcd.setCursor(0,0);
  lcd.print("    3: MAGIC    ");
  lcd.setCursor(0,1);
  lcd.print("< 2          1 >");
  magic();
  break;
 }
 }
 if(digitalRead(SW_PIN)){
 switch(mode){
  case 1:
  lcd.setCursor(0,0);
  lcd.print("    1: STARS    ");
  lcd.setCursor(0,1);
  lcd.print("< 3          2 >");
  stars();
  break;
  case 2:
  lcd.setCursor(0,0);
  lcd.print("   2: FIRERUN   ");
  lcd.setCursor(0,1);
  lcd.print("< 1          3 >");
  firerun();
  break;
  case 3:
  lcd.setCursor(0,0);
  lcd.print("    3: MAGIC    ");
  lcd.setCursor(0,1);
  lcd.print("< 2          1 >");
  magic();
  break;
 }
 }
}

void pravo() {
  mode++;
  if(mode>3){
    mode=1;
  }
  lcd.clear();
  sbros=true;
}
void levo() {
  mode--;
  if(mode<1){
    mode=3;
  }
  lcd.clear();
  sbros=true;
}
void stars() {
  black();
  fadeToBlackBy(leds, NUM_LEDS, 30);
  int pos = random16(NUM_LEDS);
  leds[pos] += CHSV(baza++ + random8(64), 200, 255);
  FastLED.setBrightness(bright);
  FastLED.show();
}
void firerun() {
  black();
  fadeToBlackBy(leds, NUM_LEDS, 5);
  int pos = beatsin16(13, 0, NUM_LEDS - 1);
  leds[pos] += CHSV(baza++, 255, 192);
  FastLED.setBrightness(bright);
  FastLED.show();
}
void magic() {
  black();
  fadeToBlackBy(leds, NUM_LEDS, 10);
    for (int i = 0; i < 8; i++) {
      leds[beatsin16(i + 7, 0, NUM_LEDS - 1)] |= CHSV(baza+=16, 200, 255);
    }
    FastLED.setBrightness(bright);
    FastLED.show();
    delay(50);
}
void black(){
  if(sbros){
  for(int b=0;b<NUM_LEDS;b++){
   leds[b]=0x000000;
  }
  FastLED.setBrightness(bright);
  FastLED.show();
  sbros=false;
  }
}